Scythe Mugen Max Review @ OCC
 

"If we look at stock performance for daily use, then the Mugen Max keeps the temps well under control. In fact, it outperformed many larger, more expensive coolers. It ran even with the Noctua D15 with two fans! So for your daily driver, the Mugen Max would be just fine. Things get a little warmer with an overclock, and the Mugen Max slips to the back of the pack of test coolers. I was hoping it would carry over the performance seen with no overclock, but the overclocked 4770K puts out a lot of heat. Adding a second fan may knock a couple degrees off the top and Scythe does supply a second set of fan clips to make it easier on you. Still the Mugen Max keeps the temps under control."

http://www.overclockersclub.com/reviews/mugne_max/